[HttpClient] fix binding to network interfaces

Author: nicolas-grekas

CurlHttpClient.php

@@ -269,7 +269,7 @@ public function request(string $method, string $url, array $options = []): Respo
         if ($options['bindto']) {
             if (file_exists($options['bindto'])) {
                 $curlopts[\CURLOPT_UNIX_SOCKET_PATH] = $options['bindto'];
-            } elseif (preg_match('/^(.*):(\d+)$/', $options['bindto'], $matches)) {
+            } elseif (0 !== strpos($options['bindto'], 'if!') && preg_match('/^(.*):(\d+)$/', $options['bindto'], $matches)) {
                 $curlopts[\CURLOPT_INTERFACE] = $matches[1];
                 $curlopts[\CURLOPT_LOCALPORT] = $matches[2];
             } else {

NativeHttpClient.php

@@ -67,8 +67,16 @@ public function request(string $method, string $url, array $options = []): Respo
     {
         [$url, $options] = self::prepareRequest($method, $url, $options, $this->defaultOptions);
 
-        if ($options['bindto'] && file_exists($options['bindto'])) {
-            throw new TransportException(__CLASS__.' cannot bind to local Unix sockets, use e.g. CurlHttpClient instead.');
+        if ($options['bindto']) {
+            if (file_exists($options['bindto'])) {
+                throw new TransportException(__CLASS__.' cannot bind to local Unix sockets, use e.g. CurlHttpClient instead.');
+            }
+            if (0 === strpos($options['bindto'], 'if!')) {
+                throw new TransportException(__CLASS__.' cannot bind to network interfaces, use e.g. CurlHttpClient instead.');
+            }
+            if (0 === strpos($options['bindto'], 'host!')) {
+                $options['bindto'] = substr($options['bindto'], 5);
+            }
         }
 
         $options['body'] = self::getBodyAsString($options['body']);